2 FreeRTOS V7.5.1 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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64 /* Standard includes. */
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67 /* Library includes. */
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68 #include "91x_lib.h"
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69 #include "91x_enet.h"
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71 /* Scheduler includes. */
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72 #include "FreeRTOS.h"
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78 #include "uip_arp.h"
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81 #include "clock-arch.h"
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83 /*-----------------------------------------------------------*/
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85 /* MAC address configuration. */
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86 #define uipMAC_ADDR0 0x00
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87 #define uipMAC_ADDR1 0x12
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88 #define uipMAC_ADDR2 0x13
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89 #define uipMAC_ADDR3 0x14
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90 #define uipMAC_ADDR4 0x15
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91 #define uipMAC_ADDR5 0x20
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93 /* IP address configuration. */
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94 #define uipIP_ADDR0 172
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95 #define uipIP_ADDR1 25
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96 #define uipIP_ADDR2 218
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97 #define uipIP_ADDR3 11
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99 /* Netmask configuration. */
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100 #define uipNET_MASK0 255
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101 #define uipNET_MASK1 255
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102 #define uipNET_MASK2 255
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103 #define uipNET_MASK3 0
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105 /* Gateway address configuration. */
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106 #define uipGATEWAY_ADDR0 172
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107 #define uipGATEWAY_ADDR1 25
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108 #define uipGATEWAY_ADDR2 218
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109 #define uipGATEWAY_ADDR3 1
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111 /* Shortcut to the header within the Rx buffer. */
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112 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
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114 /* uIP update frequencies. */
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115 #define uipMAX_BLOCK_TIME (configTICK_RATE_HZ / 4)
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117 /* Interrupt status bit definition. */
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118 #define uipDMI_RX_CURRENT_DONE 0x8000
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120 /* If no buffers are available, then wait this long before looking again. */
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121 #define uipBUFFER_WAIT_DELAY ( 10 / portTICK_RATE_MS )
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122 #define uipBUFFER_WAIT_ATTEMPTS ( 10 )
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124 /* Standard constant. */
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125 #define uipTOTAL_FRAME_HEADER_SIZE 54
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127 /*-----------------------------------------------------------*/
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130 * Send the uIP buffer to the MAC.
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132 static void prvENET_Send(void);
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135 * Setup the MAC address in the MAC itself, and in the uIP stack.
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137 static void prvSetMACAddress( void );
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140 * Used to return a pointer to the next buffer to be used.
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142 extern unsigned char *pcGetNextBuffer( void );
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145 * Port functions required by the uIP stack.
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147 void clock_init( void );
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148 clock_time_t clock_time( void );
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150 /*-----------------------------------------------------------*/
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152 /* The semaphore used by the ISR to wake the uIP task. */
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153 xSemaphoreHandle xSemaphore = NULL;
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155 /*-----------------------------------------------------------*/
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157 void clock_init(void)
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159 /* This is done when the scheduler starts. */
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161 /*-----------------------------------------------------------*/
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163 clock_time_t clock_time( void )
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165 return xTaskGetTickCount();
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167 /*-----------------------------------------------------------*/
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169 void vuIP_Task( void *pvParameters )
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172 uip_ipaddr_t xIPAddr;
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173 struct timer periodic_timer, arp_timer;
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175 /* Create the semaphore used by the ISR to wake this task. */
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176 vSemaphoreCreateBinary( xSemaphore );
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178 /* Initialise the uIP stack. */
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179 timer_set( &periodic_timer, configTICK_RATE_HZ / 2 );
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180 timer_set( &arp_timer, configTICK_RATE_HZ * 10 );
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182 uip_ipaddr( xIPAddr, uipIP_ADDR0, uipIP_ADDR1, uipIP_ADDR2, uipIP_ADDR3 );
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183 uip_sethostaddr( xIPAddr );
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184 uip_ipaddr( xIPAddr, uipNET_MASK0, uipNET_MASK1, uipNET_MASK2, uipNET_MASK3 );
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185 uip_setnetmask( xIPAddr );
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186 uip_ipaddr( xIPAddr, uipGATEWAY_ADDR0, uipGATEWAY_ADDR1, uipGATEWAY_ADDR2, uipGATEWAY_ADDR3 );
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187 uip_setdraddr( xIPAddr );
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190 /* Initialise the MAC. */
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191 ENET_InitClocksGPIO();
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193 portENTER_CRITICAL();
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196 prvSetMACAddress();
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197 VIC_Config( ENET_ITLine, VIC_IRQ, 1 );
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198 VIC_ITCmd( ENET_ITLine, ENABLE );
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199 ENET_DMA->ISR = uipDMI_RX_CURRENT_DONE;
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200 ENET_DMA->IER = uipDMI_RX_CURRENT_DONE;
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202 portEXIT_CRITICAL();
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207 /* Is there received data ready to be processed? */
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208 uip_len = ENET_HandleRxPkt( uip_buf );
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212 /* Standard uIP loop taken from the uIP manual. */
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213 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
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218 /* If the above function invocation resulted in data that
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219 should be sent out on the network, the global variable
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220 uip_len is set to a value > 0. */
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227 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
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231 /* If the above function invocation resulted in data that
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232 should be sent out on the network, the global variable
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233 uip_len is set to a value > 0. */
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242 if( timer_expired( &periodic_timer ) )
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244 timer_reset( &periodic_timer );
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245 for( i = 0; i < UIP_CONNS; i++ )
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249 /* If the above function invocation resulted in data that
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250 should be sent out on the network, the global variable
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251 uip_len is set to a value > 0. */
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259 /* Call the ARP timer function every 10 seconds. */
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260 if( timer_expired( &arp_timer ) )
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262 timer_reset( &arp_timer );
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268 /* We did not receive a packet, and there was no periodic
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269 processing to perform. Block for a fixed period. If a packet
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270 is received during this period we will be woken by the ISR
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271 giving us the Semaphore. */
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272 xSemaphoreTake( xSemaphore, configTICK_RATE_HZ / 2 );
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277 /*-----------------------------------------------------------*/
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279 static void prvENET_Send(void)
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282 static unsigned char *pcTxData;
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284 /* Get a DMA buffer into which we can write the data to send. */
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285 for( i = 0; i < uipBUFFER_WAIT_ATTEMPTS; i++ )
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287 pcTxData = pcGetNextBuffer();
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295 vTaskDelay( uipBUFFER_WAIT_DELAY );
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301 /* Copy the header into the Tx buffer. */
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302 memcpy( ( void * ) pcTxData, ( void * ) uip_buf, uipTOTAL_FRAME_HEADER_SIZE );
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303 if( uip_len > uipTOTAL_FRAME_HEADER_SIZE )
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305 memcpy( ( void * ) &( pcTxData[ uipTOTAL_FRAME_HEADER_SIZE ] ), ( void * ) uip_appdata, ( uip_len - uipTOTAL_FRAME_HEADER_SIZE ) );
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308 ENET_TxPkt( &pcTxData, uip_len );
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311 /*-----------------------------------------------------------*/
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313 void ENET_IRQHandler(void)
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315 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
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317 /* Give the semaphore in case the uIP task needs waking. */
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318 xSemaphoreGiveFromISR( xSemaphore, &xHigherPriorityTaskWoken );
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320 /* Clear the interrupt. */
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321 ENET_DMA->ISR = uipDMI_RX_CURRENT_DONE;
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323 /* Switch tasks if necessary. */
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324 portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
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326 /*-----------------------------------------------------------*/
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328 static void prvSetMACAddress( void )
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330 struct uip_eth_addr xAddr;
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332 /* Configure the MAC address in the uIP stack. */
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333 xAddr.addr[ 0 ] = uipMAC_ADDR0;
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334 xAddr.addr[ 1 ] = uipMAC_ADDR1;
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335 xAddr.addr[ 2 ] = uipMAC_ADDR2;
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336 xAddr.addr[ 3 ] = uipMAC_ADDR3;
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337 xAddr.addr[ 4 ] = uipMAC_ADDR4;
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338 xAddr.addr[ 5 ] = uipMAC_ADDR5;
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339 uip_setethaddr( xAddr );
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341 /* Write the MAC address to the MAC. */
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342 ENET_MAC->MAL = ( uipMAC_ADDR3 << 24 ) | ( uipMAC_ADDR2 << 16 ) | ( uipMAC_ADDR1 << 8 ) | ( uipMAC_ADDR0 );
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343 ENET_MAC->MAH = ( uipMAC_ADDR5 << 8 ) | ( uipMAC_ADDR4 );
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